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Finding the Fourth Proportional to 7,078.40, 10,604.80 and 6,259.20

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Solution

The fourth proportional to 7,078.40, 10,604.80 and 6,259.20 is: 9,377.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,078.40 : 10,604.80 = 6,259.20 : x
  2. Step 2: Convert to fraction form
    7,078.40/10,604.80 = 6,259.20/x
  3. Step 3: Cross multiply
    7,078.40x = 10,604.80 × 6,259.20
  4. Step 4: Simplify right side
    7,078.40x = 66,377,564.16
  5. Step 5: Solve for x
    x = 66,377,564.16/7,078.40
  6. Step 6: Final answer
    x = 9,377.48

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.